Final answer:
The situation described is an example of a relation, not a function.
Step-by-step explanation:
The situation described in the question is an example of a relation, not a function. In mathematics, a function is a relation where each input has one and only one output. In this case, Cory shows up with two dates, which means that the input (Cory's presence) is related to multiple outputs (the two dates). Therefore, it does not meet the criteria of a function.
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